JP5034280B2 - Laser distance measuring device and laser irradiation device - Google Patents

Description

  The present invention relates to a laser distance measuring device and a laser irradiation device, and more particularly to a laser distance measuring device and a laser irradiation device that are useful for improving safety and efficiency.

  Currently used long-distance laser distance measuring devices and laser irradiation devices (hereinafter referred to as first conventional devices) use YAG lasers (having a wavelength of 1.06 μm) which are dangerous for normal eyes. The reason why this YAG laser is used is that, since a relatively large laser output is required in order to target an object several km away, efficiency is a top priority because a small size and light weight are required.

On the other hand, a laser (hereinafter referred to as a second conventional apparatus) near 1.5 μm that is safe for eyes has been developed and used. Since this laser is inferior in characteristics such as oscillation efficiency, its application is limited. That is, when a large output is required, the device becomes large and is not suitable for carrying or mounting.
However, a technique for improving the conversion efficiency when the laser wavelength is converted to output an eye-safe wavelength has been developed.

An example of a technique for improving the conversion efficiency is disclosed in Patent Document 1, for example.
Patent Document 1 discloses a ratio of energy converted from excitation light to signal light and idler light in degenerate oscillation in which the wavelengths of signal light and idler light are equal in a conventional optical parametric oscillation device that generates laser light subjected to wavelength conversion. In order to improve the optical parametric oscillation device, an optical parametric oscillation device configured by providing a polarizing means between two reflecting mirrors constituting the optical resonator of the optical parametric oscillation device and the wavelength conversion element is disclosed.

  Patent Document 2 discloses an example of a wavelength conversion laser device that changes an output wavelength. This wavelength conversion laser device has a variable optical path that allows the excitation light generated by the excitation light generation source to be input to each transmission optical path position of the optical parametric optical system in which the wavelength of the laser light generated differs depending on the transmission optical path position of the excitation light. The optical system is provided, and this configuration is characterized in that the oscillation wavelength is instantaneously switched.

  Further, in Patent Document 3, a wavelength different from the wavelength of the optical communication signal is used for monitoring an optical measurement section in which an optical communication signal having one or more wavelengths is transmitted or received or for measuring characteristics (testing the operation capability). In a measuring instrument that couples a light measurement signal to an optical measurement section and directs the reflected light signal from the optical measurement section of the light measurement signal to a light detection device to monitor or characterize the optical measurement section. A switchable filter device is provided in the optical path between the optical detection device and the photodetection device, which allows the reflected light signal to pass through the photodetection device, but does not allow any optical communication signal to be sent to the photodetection device (significantly attenuates), Thus, the measuring instrument is disclosed in such a way that it can test the operational capability of the optical measurement section (optical network) in operation.

Further, Patent Document 4 includes a first laser oscillator that outputs a safety confirmation laser beam and a second laser oscillator that outputs a measurement laser, and the control circuit first sets the first laser oscillator. After confirming that there is no shielding object up to the distance to be measured and it is safe to emit the measurement laser toward the target, the second laser oscillator is operated to perform measurement. A laser radar is disclosed.
Japanese Patent Laid-Open No. 11-095271 JP 2000-338531 A JP-A-10-213543 Japanese Patent Laid-Open No. 08-029533

Although the laser emission efficiency of the YAG laser used in the first conventional apparatus is good, the laser beam is dangerous to the eyes, so there is a technical problem that a protective measure is required when using the YAG laser, for example, during training and exercises. is there. When there was a person who could not confirm the protective measures, there was an inconvenience that the laser beam could not be emitted.
In addition, the second conventional apparatus has a light emission efficiency lower than that of the YAG laser, which is roughly 25% or less of the YAG laser. Therefore, when the output equivalent to that of the YAG laser is obtained, the apparatus becomes large and heavy. There is a technical problem.

Patent Document 1 is a technique for improving the conversion efficiency of the wavelength of laser light output from a laser light source, which converts laser light from a laser light source into a plurality of laser lights and selects one of the laser lights. There is absolutely no suggestion of focusing on.
Further, in Patent Document 2, since a complicated optical system is used to change the wavelength, it is considered that the technique is not suitable for an application requiring severe environmental resistance performance such as a helicopter-mounted device.

Further, the disclosure of Patent Document 3 is limited to selection of an optical communication signal and a reflected light signal that flow in the optical measurement section. The technical means is not disclosed in relation to other technical configurations, and the technical effect that the relation causes is unclear.
Patent Document 4 requires two laser oscillators, and includes the same technical problem as Patent Document 1.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a laser distance measuring device and a laser irradiation device that can achieve safety and efficiency by switching filters.

In order to solve the above-mentioned problem, the invention described in claim 1 relates to a laser distance measuring device that outputs a laser beam from a laser device and measures a distance to a target, wherein the first wavelength laser beam, A laser output device that simultaneously outputs a laser beam having a second wavelength longer than that of the first laser beam; and an optical axis of the first and second laser beams; A selection filter that removes laser light and passes the second wavelength; and a movable mechanism that manually or electrically inserts the selection filter on the optical axis or retracts the optical filter as needed. The selection filter is formed by arranging two dichroic mirrors having the same thickness and the same thickness made of the same material having the same optical characteristics and symmetrically arranged at a predetermined angle with respect to the optical axis. It is said.

The invention according to claim 2 relates to the laser distance measuring device according to claim 1, relates to a laser distance measuring device which outputs a laser beam from the laser device and measures the distance to the target, and a laser having the first wavelength. A laser output device that simultaneously outputs light and a laser beam having a second wavelength longer than that of the first laser beam; and an optical axis of the first and second laser beams, A selection filter that removes the laser beam having the first wavelength and allows the second wavelength to pass through, and the selection filter is manually or electrically inserted on the optical axis or retracted from the optical axis as necessary. The selection filter is characterized in that two dichroic mirrors of the same plane and parallel plate made of the same material having the same optical characteristics are bonded together .

According to a third aspect of the invention relates to a laser distance measuring apparatus according to claim 1 or 2, wherein selection means for selecting alternatively the first mode or the second mode, is the selection means, the first When the mode is selected, the movable mechanism is driven and controlled to insert the selection filter onto the optical axis. On the other hand, when the selection unit selects the second mode, the movable mechanism is driven and controlled. Control means for retracting the selection filter out of the optical axis is added.

According to a fourth aspect of the present invention, there is provided the laser irradiation apparatus according to the first , second, or third aspect , wherein the laser output apparatus includes a laser light oscillator and a wavelength conversion element.

According to a fifth aspect of the present invention, there is provided the laser distance measuring device according to the fourth aspect , wherein the laser beam oscillator is a YAG oscillator.

A sixth aspect of the present invention relates to the laser distance measuring device according to the fourth or fifth aspect , wherein the wavelength conversion element is an optical parametric oscillator.

A seventh aspect of the invention relates to the laser distance measuring device according to any one of the first to sixth aspects, wherein the movable mechanism is a reciprocating means for reciprocating the selection filter.

The invention according to claim 8 relates to the laser range finder according to claim 7 , wherein the angle at which the selection filter crosses the optical axis by the reciprocating means is 90 degrees.

A ninth aspect of the invention relates to the laser distance measuring device according to any one of the first to sixth aspects, wherein the movable mechanism is a rotating means for rotating the selection filter.

A tenth aspect of the present invention relates to the laser distance measuring device according to any one of the first to sixth aspects, wherein the movable mechanism is a plane driving unit that moves the selection filter up, down, left and right. Yes.

An eleventh aspect of the present invention relates to the laser distance measuring device according to any one of the first to tenth aspects, wherein a two-wavelength compatible light transmitting device is provided on the laser light emitting side of the selection filter. Yes.

A twelfth aspect of the present invention relates to the laser distance measuring device according to any one of the first to tenth aspects, wherein the movable mechanism is a two-wavelength compatible light transmission between the laser output device and the selection filter. A device is provided.

The invention according to claim 13 relates to a laser irradiation apparatus for outputting a laser beam from a laser apparatus and irradiating a target, wherein the laser beam has a first wavelength and a wavelength longer than that of the first laser beam. A laser output device that simultaneously outputs a laser beam of a second wavelength; and an optical axis of the first and second laser beams, wherein the laser beam of the first wavelength is removed, and the second A selection filter that allows the wavelength to pass; and a movable mechanism that manually or electrically inserts the selection filter on the optical axis or retracts the optical filter outside the optical axis as necessary. The dichroic mirrors having the same thickness and plane parallel plates made of the same material having the same optical characteristics are arranged symmetrically at a predetermined angle with respect to the optical axis .

A fourteenth aspect of the present invention relates to a laser irradiation apparatus that outputs laser light from a laser apparatus to irradiate a target, and includes a first wavelength laser light and a second wavelength that is longer than the first laser light. A laser output device that simultaneously outputs a laser beam having a wavelength of λ, and an optical axis of the first and second laser beams, removing the laser beam having the first wavelength, A selection filter that passes through, and a movable mechanism that inserts the selection filter on the optical axis or retracts the optical filter out of the optical axis, if necessary, manually or electrically. It is characterized in that two dichroic mirrors having the same thickness and the same thickness and made of the same material are bonded .

According to a fifteenth aspect of the present invention, there is provided the laser irradiation apparatus according to the thirteenth or fourteenth aspect , wherein the selection unit that selectively selects the first mode or the second mode, and the selection unit includes the first mode. When the mode is selected, the movable mechanism is driven and controlled to insert the selection filter onto the optical axis. On the other hand, when the selection unit selects the second mode, the movable mechanism is driven and controlled. Control means for retracting the selection filter out of the optical axis is added.

A sixteenth aspect of the present invention relates to the laser irradiation apparatus according to the thirteenth, fourteenth, or fifteenth aspect , wherein the laser output device includes a laser light oscillator and a wavelength conversion element.

According to a seventeenth aspect of the present invention, there is provided the laser irradiation apparatus according to the sixteenth aspect , wherein the laser light oscillator is a YAG oscillator.

The invention according to claim 18 relates to the laser irradiation apparatus according to claim 16 or 17 , wherein the wavelength conversion element is an optical parametric oscillator.

Further, an invention according to claim 19, wherein, relates to a laser irradiation apparatus according to any one of claims 13 to 18, the movable mechanism is characterized in that said selective filter is a reciprocating means for reciprocating .

The invention of claim 20 wherein relates to a laser irradiation apparatus according to claim 19, by the reciprocating means, the angle which the selective filter crosses the optical axis is characterized in that 90 degrees.

A twenty- first aspect of the present invention relates to the laser irradiation apparatus according to any one of the thirteenth to eighteenth aspects, wherein the movable mechanism is a rotating unit that rotates the selection filter.

A twenty-second aspect of the present invention relates to the laser irradiation apparatus according to any one of the thirteenth to eighteenth aspects, wherein the movable mechanism is a plane driving unit that moves the selection filter up, down, left, and right. .

A twenty- third aspect of the present invention relates to the laser irradiation apparatus according to any one of the thirteenth to twenty-second aspects, wherein a two-wavelength compatible light transmitting device is provided on the laser light emitting side of the selection filter. .

A twenty-fourth aspect of the present invention relates to the laser irradiation apparatus according to any one of the thirteenth to twenty-second aspects, wherein a two-wavelength compatible light transmission device is provided between the laser output device and the selection filter. It is a feature.

According to the present invention, the selection filter is provided on the laser beam emission side of the laser output device that outputs the laser beam having the first wavelength and the laser beam having the second wavelength that is longer than the first wavelength. Is inserted into the optical axis or retracted out of the optical axis by a movable mechanism, so that the efficiency and safety of the apparatus can be enjoyed by inserting and removing the selection filter. As a result, it is possible to use properly depending on the situation, and it is possible to expand the range of use in a disaster investigation or the like.
In addition, since the wavelength can be easily switched, a protective measure at the time of training becomes unnecessary, and a laser distance measuring device that can be used anytime can be provided.

The present invention includes a selection filter that can be inserted into and removed from the optical axis of a laser output device , and a movable mechanism that causes the selection filter to insert and remove.

FIG. 1 is a diagram showing a configuration of a laser distance measuring device that is Embodiment 1 of the present invention, FIG. 2 is a diagram showing a state where a movable filter of the laser distance measuring device is separated from the optical axis, and FIG. FIG. 3 is a diagram for explaining the operation of the movable filter of the laser distance measuring device.
The laser distance measuring device 1 of this embodiment relates to a device in which a movable filter is detachably provided on the optical axis of a laser beam from a YAG laser and a laser beam obtained by converting the wavelength of the laser beam, as shown in FIG. As shown in the figure, it is composed of a YAG laser oscillator 12, an optical parametric oscillator (hereinafter referred to as an OPO (Optical Parametric Oscillator)) 14, a movable filter 16, a 1.06 μm damper 18, and a two-wavelength compatible light transmitting telescope 20. ing.

  The YAG oscillator 12 is a laser oscillator for generating excitation light that generates laser light having a wavelength of 1.06 μm. The OPO 14 is a converter that converts laser light having a wavelength of 1.06 μm into laser light having a wavelength of 1.57 μm according to a known principle. The movable filter 16 is a filter that reflects most of the laser light having a wavelength of 1.06 μm and passes only the laser light having a wavelength of 1.57 μm as it is.

  The movable filter 16 is a mirror called a dichroic mirror, and has a property that the transmittance is extremely different depending on the wavelength of light. In this embodiment, a wavelength switching filter in which the transmittance of laser light having a wavelength of 1.06 μm is adjusted to 0.5% and the transmittance of laser light having a wavelength of 1.57 μm is adjusted to 99.5% is used. The movable filter 16 is inserted into the optical axis of the laser beam by a small electric motor 17 (not shown) and is moved out of the optical axis.

  The drive control of the small electric motor 17 is configured to be performed by a selection unit and a control unit (not shown). The selection means selects either the safety priority mode (mode for selecting laser light having a wavelength of 1.57 μm) or the efficiency priority mode (mode for selecting laser light having a wavelength of 1.06 μm). If the mode selected by the selection means is the safety priority mode, the control means inserts the small electric motor 17 into the optical axis, and if the mode is the efficiency priority mode, the control means reduces the control to retract the small electric motor 17 out of the optical axis. It is generated in the electric motor 17.

  In addition, as shown in FIG. 1, the movable filter 16 has a dichroic mirror of a plane parallel plate of the same thickness and made of the same material having the same optical characteristics, and the two pieces are symmetric with respect to the optical axis. Since it is disposed, the optical axis does not change even when the movable filter enters the optical axis (FIG. 3). The movable filter 16 is preferably a dichroic mirror having the above configuration, but is not limited thereto.

  The 1.06 μm damper 18 is a laser light absorber that absorbs the laser light reflected by the movable filter 16 and prevents it from leaking outside. The two-wavelength compatible light transmission telescope 20 is a light transmitter that irradiates an external target with laser light that has passed through the movable filter 16 with or without the action of the movable filter 16.

Next, the operation of this embodiment will be described with reference to FIGS.
In a state where the YAG oscillator 12 of the laser distance measuring device 1 can generate laser light and the movable filter 16 is inserted on the optical axis of the laser light, laser light having a wavelength of 1.06 μm is emitted from the YAG oscillator 12. When generated, the laser beam is converted by the OPO 14 into a laser beam having a wavelength of 1.57 μm and output. At that time, a laser beam having a wavelength of 1.06 μm is also output from the OPO 14.
Most of the laser light having a wavelength of 1.06 μm is reflected by the movable filter 16 and only the laser light having a wavelength of 1.57 μm passes through the movable filter 16 as it is.

Specifically, as described above, the movable filter 16 is composed of a material having a property that the transmittance is extremely different depending on the wavelength of light. In this embodiment, 0.5% of the laser light having a wavelength of 1.06 μm is used. % Is transmitted, and 99.5% of the laser light having a wavelength of 1.57 μm is transmitted.
Further, the movable filter 16 is configured by arranging two dichroic mirrors having the same thickness symmetrically with respect to the optical axis (FIGS. 1 and 3). Even if inserted on the optical axis, the optical axis does not change (FIG. 3). This means that the aiming performance required as a laser distance measuring device is not deteriorated. 1 and 3, the alternate long and short dash line is the center (optical axis).

The laser light reflected by the movable filter 16 is absorbed by the 1.06 μm damper 18 and does not leak out. The laser beam that has passed through the movable filter 16 is irradiated to an external target by the two-wavelength compatible light transmission telescope 20.
In the state where the movable filter 16 is inserted on the optical axis of the laser beam, the laser beam irradiated from the two-wavelength compatible light transmitting telescope 20 to the external target has the OPO 16 interposed therebetween, that is, Due to the conversion efficiency, it is about 1/5 of the original YAG laser beam.

The operation in the state (FIG. 2) in which the movable filter 16 is removed (extracted) from the state inserted on the optical axis of the laser light will be described below.
The operation at that time is that a laser beam having a wavelength of 1.06 μm is generated from the YAG oscillator 12, and the laser beam is converted into a laser beam having a wavelength of 1.57 μm by the OPO 14, and a laser beam having a wavelength of 1.06 μm and a wavelength of 1.57 The process up to the point where the μm laser beam is emitted from the OPO 14 is the same as described above.

In a state where the movable filter 16 is extracted from the optical axis of the laser light, the laser light having a wavelength of 1.57 μm and the laser light having a wavelength of 1.06 μm output from the OPO 14 are two-wavelength-compatible light transmitting telescopes 20. To the external target.
Therefore, since the laser beam output to the outside is both the laser beam having a wavelength converted by the OPO 14 of 1.57 μm and the YAG laser beam, the intensity thereof is almost the same as that of the original YAG laser beam.
As described above, in a state where the movable filter 16 is extracted from the optical axis of the laser beam, all of the generated laser beam is irradiated to the external target, so that it is possible to measure a farther target.

As described above, according to the configuration of this embodiment, since the wavelength switching filter is provided so as to be able to be inserted into and extracted from the optical axis without changing the optical axis of the laser light, the optical axis of the distance measuring device is not affected. It is possible to easily switch between an efficient YAG laser beam and an eye-safe type laser beam that is safe for the eyes. As a result, it is possible to achieve both efficiency and safety while avoiding an increase in the size of the apparatus, and it is possible to selectively use depending on the situation, and it is possible to expand the range of use in a disaster investigation or the like.
Since the wavelength can be easily switched, no protective measures are required during training, and a laser distance measuring device that can be used anytime can be provided.

FIG. 4 is a diagram showing the main configuration of a laser distance measuring apparatus which is Embodiment 2 of the present invention.
The configuration of this embodiment is significantly different from that of the first embodiment in that two filters are bonded together so that they can be inserted and removed in a direction perpendicular to the optical axis of the laser beam.
As shown in FIG. 4, the laser distance measuring apparatus 1A (not shown in FIG. 4) of this embodiment moves two bonded filters 16c and 16d (movable filter 16A) to the optical axis of the laser beam. It is provided so that it can be inserted and removed in a direction perpendicular to it.
Since the configuration of this embodiment other than this configuration is the same as that of the first embodiment, the explanation thereof is omitted.

The operation and effects of this embodiment are almost the same as those of the first embodiment. That is, the movable filter 16A can easily switch the wavelength. Moreover, even if the movable filter 16A is inserted in a direction perpendicular to the optical axis of the laser beam, there is a function of canceling the change of the optical axis and returning it to the original, which affects the optical axis of the laser distance measuring device. There is no.
In addition, since two filters having the same characteristics are stacked, the effect of the filter is squared as compared with the case where one filter is used, so that safety is further improved.
However, there is a possibility that the laser light having a wavelength of 1.06 μm returns to the OPO 14 or the YAG laser oscillator 12 and the laser oscillation becomes unstable.

FIG. 5 is a diagram showing the main configuration of a laser distance measuring apparatus according to Embodiment 3 of the present invention.
The configuration of this embodiment is significantly different from that of the first embodiment in that one filter is provided so as to be able to be inserted and removed at a predetermined angle with respect to the optical axis of the laser beam.
As shown in FIG. 5, the laser distance measuring device 1B (not shown in FIG. 5) of this embodiment can insert and remove one movable filter 16B at a predetermined angle with respect to the optical axis of the laser beam. The characteristic part is provided.
Since the configuration of this embodiment other than this configuration is the same as that of the first embodiment, the explanation thereof is omitted.

  The operation and effects of this embodiment are almost the same as those of the first embodiment. That is, since the movable filter 16B can easily switch the wavelength, the same effect as the first embodiment can be obtained. However, since the laser beam is refracted and the optical axis is shifted, aiming performance is deteriorated.

FIG. 6 is a diagram showing the configuration of a laser distance measuring apparatus which is Embodiment 4 of the present invention.
The configuration of this embodiment is greatly different from that of the first embodiment in that a movable filter is provided on the light output side of the two-wavelength compatible telescope so that it can be inserted and removed.
As shown in FIG. 6, the laser distance measuring device 1C (not shown in FIG. 6) of this embodiment is provided with a movable filter 16C that can be inserted into and removed from the light output side of the two-wavelength compatible telescope. It consists of.
Since the configuration of this embodiment other than this configuration is the same as that of the first embodiment, the explanation thereof is omitted.

  The operation and effects of this embodiment are almost the same as those of the first embodiment. That is, since the movable filter 16C can easily switch the wavelength, the same effect as the first embodiment can be obtained.

FIG. 7 is a diagram showing the main configuration of a laser distance measuring apparatus which is Embodiment 5 of the present invention.
The configuration of this embodiment is greatly different from that of the first embodiment in that a movable filter having partially different filter characteristics is provided to be rotatable with respect to the laser beam.
The laser distance measuring device 1D (not shown in FIG. 7) of this embodiment has partially different filter characteristics as shown in FIG. 7, that is, the filter portion 16g corresponds to the wavelength A, for example. In the filter portion 16h, a movable filter 16E corresponding to the wavelength B is provided so as to be rotatable with respect to the laser beam, and its characteristic portion is configured. Similar to the first embodiment, the movable filter 16E is configured such that the two filters 16e and 16f are inclined symmetrically by a predetermined angle with respect to the optical axis.
Since the configuration of this embodiment other than this configuration is the same as that of the first embodiment, the explanation thereof is omitted.

  The operation and effects of this embodiment are almost the same as those of the first embodiment. That is, since the movable filter 16E can easily switch the wavelength, the same effect as the first embodiment can be obtained.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and the design does not depart from the gist of the present invention. These changes are included in the present invention.
For example, the movable filter may be configured by a plurality of portions having different transmittances with respect to wavelengths, for example, and each portion may be configured to be movable relative to the laser light. In addition to the transmittance, a movable filter that exhibits the same effect using the refractive index may be used.
Moreover, the movable filter may be configured by being arranged in plural on the optical axis of the laser beam.
Further, the YAG laser oscillator and the OPO may be configured to be relatively movable with respect to the movable filter.

  The laser irradiation apparatus disclosed here can be used as various laser ranging apparatuses and laser irradiation apparatuses.

It is a figure which shows the structure of the laser ranging apparatus which is Example 1 of this invention. It is a figure which shows the state which separated the movable filter of the laser rangefinder from the optical axis. It is a figure explaining the effect | action of the movable filter of the laser rangefinder. It is a figure which shows the principal part structure of the laser ranging apparatus which is Example 2 of this invention. It is a figure which shows the principal part structure of the laser ranging apparatus which is Example 3 of this invention. It is a figure which shows the structure of the laser ranging apparatus which is Example 4 of this invention. It is a figure which shows the principal part structure of the laser ranging apparatus which is Example 5 of this invention.

Explanation of symbols

1, 1A, 1B, 1C Laser ranging device 2 YAG laser oscillator (part of laser output device )
4 OPO (the remainder of the laser output device )
16 Movable filter (selection filter)
17 Small electric motor (movable mechanism)
20 Two-wavelength compatible transmitter (two-wavelength transmitter)

Claims (24)

A laser distance measuring device for measuring a distance to a target by outputting laser light from a laser device,
A laser output device that simultaneously outputs a laser beam having a first wavelength and a laser beam having a second wavelength that is longer than the first laser beam;
A selection filter that is provided on the optical axes of the first and second laser lights, removes the laser light of the first wavelength, and passes the second wavelength;
The selection filter is provided with a movable mechanism that is manually or electrically inserted on the optical axis or retracted outside the optical axis as necessary .
The laser distance measuring device characterized in that the selection filter is formed by arranging two dichroic mirrors of a plane parallel plate of the same thickness and made of the same material having the same optical characteristics at a predetermined angle with respect to the optical axis. . A laser distance measuring device for measuring a distance to a target by outputting laser light from a laser device,
A laser output device that simultaneously outputs a laser beam having a first wavelength and a laser beam having a second wavelength that is longer than the first laser beam;
A selection filter that is provided on the optical axes of the first and second laser lights, removes the laser light of the first wavelength, and passes the second wavelength;
The selection filter is provided with a movable mechanism that is manually or electrically inserted on the optical axis or retracted outside the optical axis as necessary .
2. The laser distance measuring apparatus according to claim 1, wherein the selection filter is formed by bonding two dichroic mirrors having the same thickness and having the same thickness and made of the same material and having the same optical characteristics . Selecting means for alternatively selecting the first mode or the second mode;
When the selection unit selects the first mode, the movable mechanism is driven and controlled to insert the selection filter on the optical axis,
2. The control unit according to claim 1, further comprising a control unit that drives and controls the movable mechanism to retract the selection filter out of the optical axis when the selection unit selects the second mode. Or the laser ranging apparatus of 2 description. 4. The laser distance measuring device according to claim 1 , wherein the laser output device includes a laser light oscillator and a wavelength conversion element. The laser irradiation apparatus according to claim 4 , wherein the laser light oscillator is a YAG oscillator. 6. The laser distance measuring device according to claim 4 , wherein the wavelength conversion element is an optical parametric oscillator. The laser range finder according to any one of claims 1 to 6 , wherein the movable mechanism is a reciprocating means for reciprocating the selection filter. 8. The laser range finder according to claim 7 , wherein an angle at which the selection filter crosses the optical axis by the reciprocating means is 90 degrees. The movable mechanism is a laser distance measuring apparatus according to any one of claims 1 to 6, characterized in that a rotation means for rotating the selected filter. The laser range finder according to any one of claims 1 to 6 , wherein the movable mechanism is a plane driving unit that moves the selection filter vertically and horizontally. Laser ranging device according to any one of claims 1 to 10, characterized in that two-wavelength handling type transmitting device is provided in the laser beam emitting side of the selective filter. Laser ranging device according to any one of claims 1 to 10, characterized in that two-wavelength handling type transmitting device is provided between the said selective filter and the laser output device. A laser irradiation device that outputs laser light from a laser device and irradiates a target,
A laser output device that simultaneously outputs a laser beam having a first wavelength and a laser beam having a second wavelength that is longer than the first laser beam;
A selection filter that is provided on the optical axes of the first and second laser lights, removes the laser light of the first wavelength, and passes the second wavelength;
The selection filter is provided with a movable mechanism that is manually or electrically inserted on the optical axis or retracted outside the optical axis as necessary .
2. The laser irradiation apparatus according to claim 1, wherein the selection filter is formed by arranging two parallel dichroic mirrors of the same thickness and made of the same material having the same optical characteristics at a predetermined angle with respect to the optical axis . A laser irradiation device that outputs laser light from a laser device and irradiates a target,
A laser output device that simultaneously outputs a laser beam having a first wavelength and a laser beam having a second wavelength that is longer than the first laser beam;
A selection filter that is provided on the optical axes of the first and second laser lights, removes the laser light of the first wavelength, and passes the second wavelength;
The selection filter is provided with a movable mechanism that is manually or electrically inserted on the optical axis or retracted outside the optical axis as necessary .
2. The laser irradiation apparatus according to claim 1, wherein the selection filter is formed by bonding two dichroic mirrors having the same thickness and having the same thickness and made of the same material and having the same optical characteristics . Selecting means for alternatively selecting the first mode or the second mode;
When the selection unit selects the first mode, the movable mechanism is driven and controlled to insert the selection filter on the optical axis,
14. The control unit according to claim 13 , further comprising: a control unit that drives and controls the movable mechanism to retract the selection filter out of the optical axis when the selection unit selects the second mode. Or the laser irradiation apparatus of 14 . 16. The laser irradiation apparatus according to claim 13, 14 or 15 , wherein the laser output device comprises a laser light oscillator and a wavelength conversion element. The laser irradiation apparatus according to claim 16 , wherein the laser light oscillator is a YAG oscillator. The laser irradiation apparatus according to claim 16 , wherein the wavelength conversion element is an optical parametric oscillator. The laser irradiation apparatus according to any one of claims 13 to 18 , wherein the movable mechanism is a reciprocating means for reciprocating the selection filter. 20. The laser irradiation apparatus according to claim 19 , wherein the reciprocating means causes the selection filter to cross the optical axis at an angle of 90 degrees. The laser irradiation apparatus according to claim 13 , wherein the movable mechanism is a rotating unit that rotates the selection filter. The laser irradiation apparatus according to any one of 13 to 18 , wherein the movable mechanism is a plane driving unit that moves the selection filter up, down, left, and right. The laser irradiation apparatus according to any one of claims 13 to 22 , wherein a two-wavelength compatible light transmission device is provided on a laser light emission side of the selection filter. 23. The laser irradiation apparatus according to claim 13 , wherein a two-wavelength compatible light transmission device is provided between the laser output device and the selection filter.

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